Lock for foundry flasks



May 6 1924.

G. F. LOUGHRAN- Lox FOR FOUNDRY FLAsKs Filed Nov. l. 1922 Patented May6, 1924.

N iT ED 'r T 1,493,118 ATENr OFFICE.

GEORGE F. LO'UG-HRAN, 0F BOSTON, MASSACHUSETTS, ASSIGNOR 0F ONE-.HALF TOFREDERICK C. LANGENBERG, OF CAMBRIDGE, MASSACHUSETTS.

LOCK FOR FOUNDRY FLASKS.

Application filed November 1, 1922. Serial N'o. 598,307..

To all-whom it may concer/n: n y

Be it known that I, GEORGE F. LOUGHRAN, a citizen of' the UnitedStates,residing at Boston, county of Suffolk, State of Massachusetts, haveinvented a certain new and useful Improvement in Locks for FoundryFlasks, of which the following is a specification, reference being hadtherein to the accompanying drawings.

,This vinvention relates more particularly to locks to fasten togetherthe sides of the ordinary types of molders snap flasks used in metalcasting. Due to the fact that these flasks must be handled and operatedlargely by unskilled labor, fit is necessary to make their constructionas simple as possible consistent with the accomplishment of the resultsdesired.

The purpose of my invention is to provide` a lock for one corner of eachpart or section or the ordinary type of hinged snap flask, which can beeasily operated by unskilled labor and which can under nocircuinstancesy become accidentally unfastened. The customary` types oflocks used on molders flasks have been in many respects unsatisfactory.'It has been found under present working conditions that the locks, which'have been used, would become unfastened and cause the mold, in theprocess of being formed, to be injured or entirely spoiled.

Moldingv machines have largely replaced the old method of ramming, sandinto the flask b-yhand. These molding or jarring machines areconstructedso as to cause the flask, which is placed thereon, to be violentlyjarred up and down for the purpose of forcing the sand to properlyadjustv itself to form the mold.` It is vunder such conditionsparticularly that the old types of locks have proved unsatisfactory. Myinvention, therefore, consists in a lock, which not only can be easilyengaged and disengaged, but which will not become unfastened under theabove described working conditions.

The invention will bevfully understood from theY following descriptionwhen taken in connection with the accompanying drawings, and the novelfeatures thereof will be pointed out and clearly defined in the claimsat the close ofthis specification.

In the accompanying drawings, Fig. l is a plan view of one part, orsection, of an ordinary type of hinged melders fiask with my lockingdevice attached thereto. y

Fig. 2 is a side elevation showing the lock of my invention.

Fig. 3 is a perspective view of a two-part molders flasln the cope anddrag being placed together in the manner employed in making molds. Myinvention is shown attached to each of these parts or sections.

Similar letters of reference indicate the same partsy in all of thefigures.

A, B, C, and D, denote the sides of one part'or section of a meldersflask, the sides A and B being permanently. attached together at onecorner and the sides C and D being attachedin a similar way atthe'diagonally opposite corner. In Figure l, the sections formed bysides A and B, on the onehand, and C and D, on the other, are hingedtogether at E.

Attached tothe corner of 4each part or section of the flask, diagonallyopposite the hinged point E, is shown, in Figure l. my locking device,indicated as F. AThe locking device F consists of two lug members (if`and H. These4 lug members are attached, by means of'screws or othersuitable means, to the sides B and C respectively, of each part orsection of the flask. The lug` member G has two lugs a and b, which maybe Iclearly seen in Figure 2 of the drawing.

The lug member H has also provided thereon two lugs similar tothose'attached to the lug member Gr. These lugs are indicated in Figure2 as c and d. The, lower lug 0 yhas a hole which registers with thecorresponding hole in the lug and the lug d has a similar hole whichregisters with the holeA in the lug a. Ther lug d is also provided witha hole e through which passes a vertical portion of a slidable latchfK.The latch K is provided with a spiral springL, around the" abovementioned vert-ical portion, and a pin m. The spring L isfsup y lugs arebrought into register, as above pointed out, the pins g and f will enterthe holes in the lugs ci and a, and c and b, respectively.

It is clear from the above description that when the latch K .is soengaged in the lugs a, Z9, c, and d, no amount of jarring, due to theplacing of the device on a molding machine, will be sufficient to causethe locking device to become disengaged. rI his desirable result isaccomplished by reason of the fact that the latch is held rmly in anengaged position by the spring L and, in addition, is assisted by theforce or' gravity which tends to keep the bolts or pins j and g soengaged.

It is also to be observed that my latch, because of the presence of thetwo pins or bolts, forms a more .secure lock for each part or section ofthe iiasks than has previously been provided. It is clear that the twoadjacent sides of each part or section, which are to be locked, are verysatisfactorily held together because the pin or bolt g engages the lugsd and a near the upper edge of the adjacent sides and the pin f engagesthe lugs c and l) near the lower edge. These bolt portions g and j,being parts of the same latch member may be simultaneously released by arelatively small movement of the latter, this movement being readilypermitted f even in the case of assembled flask sections,

as shown in Figure 3.

Modifications in the details of the device described may be made withoutdeparting from the spirit of my invention or sacrificing any of itsadvantages.

I-Iaving thus described the invention, what I claim as new is l. In amolders flask, the combination with the four sides and corners, of ahinged connection at one corner, and a lock at the diagonally -oppositecorner, said lock comprising lng members secured to adjacent r sides ofsaid flask respectively, and a verticallyslidable bolt movable to engageand disengage both of said lug members.

EZ.4 In a molders flask, the combination.

with the four sides and corners, of a. hinged connection at one corner,and a lock at the diagonally opposite corner, said lock comprising lugmembers secured to adjacent sides of said flask and provided with lugs,each lug of one lug member having a hole registering with acorresponding hole in a lug of the adjacent lug member, and a verticallyslidable latch adapted to enter said registering holes.

3. In a molders flask, the combination with the four sides and corners,of a hinged connection at one corner, and a lock at the diagonallyopposite corner, said lock comprising lug members secured to adjacentsides of said flask and provided with lugs,

each lug of one lug member having a hole registering with acorresponding hole in ka lug of the adjacent lug member, and avertically slidab-le latch, guided in one of said lug members, andhaving upper and lower pins adapted respectively to engage the up# perand lower lugs of the said lug members.

4. In a molders flask, the combination with the four sides and corners,of a hinged connection at one corner, and a lock at the diagonallyopposite corner, said lock comprising lug members secured to adjacentsides of said iiask and provided with lugs, each lug of one lugmemberhaving a hole registering with a corresponding hole in a lug` ofthe adjacent lug member, and a vertically slidable latch, guided in oneof said lug members, having upper and lower offset portions or pins,adapted respectively to engage the upper and lower' lugs of the said lugmembers, said latch having a spring to assist in holding it downward inthe engaged position.

5. In a molders snap flask, lthe combination with the four sides andcorners, of a hinged connection at one corner, and a lock at thediagonally opposite corner, said lock comprising lug members secured toadjacent sides of said flask and provided with lugs, each lug of one lugmember having a hole registering with a corresponding hole in a lug ofthe yadjacent lug member, and a ver= tically slidable latch guidedin oneof said lug` members, having upper and lower offsetportions or pins,adapted respectively to engage the upper and lower lugs ofthe said lugmembers, said latch having a vertical portion, a spiral spring aroundsaid vertical portion, and a pin positioned in said vertical portion,one end of said spring resting `on said pin and the other end ofsaidspring resting on the lower face of'v one of saidlug `members toassist in holding said .latch downward in the engaged position.

6. In a molders flask, the combination with the four sides and corners,of a hinged connection at one corner, and a lock at Vthe diagonallyopposite corner, said lock comprising lug members secured toV adjacentsides of said iiask respectively, and a longitudinally slidable bolt toengage and lock the lug members of the adjacent sides together.

7 In a molders flask, the combination with the four sides and corners,of a hinged connection at one corner, and a lock at thediagonallyopposite corner, said lock comprising lugs on each of twoadjacent sides at points adjacent the upper and lower edges thereof anda slidable bolt having portions to lock each of said lugs to acorresponding lug on the adjacent side. y

In testimony whereof I affix my signature GEORGE' F. LOUGI-IRAN.

